username = '13312345678'
password = '123456'
verifycode = '6666'

user_name = input("手机号: ")
pass_word = input("密码: ")
verify_code = input("验证码: ")

if user_name == username and pass_word == password and verify_code == verifycode:
    print("登录成功")
elif user_name != username and pass_word == password and verify_code == verifycode:
    print("账号不存在")
elif user_name == username and pass_word != password and verify_code == verifycode:
    print("密码错误")
elif user_name == username and pass_word == password and verify_code != verifycode:
    print("验证码错误")
else:
    print("登录失败")
